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One method for the placement of thickened tailings is the central discharge technique. The beach slopes
achieved with this method have generally been in the order of 2 to 3%. With such small beach slopes, it is
important to be able to predict the slope angles accurately. This is often done using laboratory flume tests.
However, these predictions have tended to overestimate slope angles. This paper presents a model that takes
account of the wall friction in flume tests and illustrates the folly of using flume tests indiscriminately. The
model does not account for issues such as deposition rate or initial velocity, but serves to quantify the
potential errors of using flume data for direct extrapolation to field applications.
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The validity of laboratory flume data for predicting beach slopes of thickened tailings deposits A.B. Fourie and S.K.Y. Gawu
254 Paste 2010, Toronto, Canada